Rotary valve for internal-combustion engines.



F. A. TRUESDELL.

ROTARY VALVE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED FEB. 7, 19m.

1,1 1 3,532., Patented 6st. 13, 1914.

2 SHEETS-SHEET 1.

F. A. TRUESDELL. ROTARY VALVE FOR INTERNAL OOMBUSTiON ENGINES.

APPLICATION FILED Fmm, 1914. 1,113,512. Patented Oct.13,1914. 2 SHEETSSHEET z.

Ww- K35 m 94% X Ul lllliD STATE% T FRED ADRIAN TRUESIDELL, 0F YOUNGSTOWN, ,OHXUi RQTARY VALVE FOR INTERNAIPCOMBUSTION ENGINES.

To all whom it may concem: I

Be it known that l, FRED Annmx Tunes mum, citizen of the United States, residing at Youngstown, in the county of hiahoning and State of Ohio, have invented certain new and useful lmpixweinents in Rotary Valves for lnternal-Combustion Engines, of which the following is a specification. reference being bad to the accompanying drliwings.

'his invention relates to an improved r tary valve for internal combustion engines and has for its primary object to provide an improved valve of this type more particularly designed for use in connection wit thefonr-cycle type of gas engine whereby the gas is admitted to the combustion chamber of the engine cylinder and the burnt gases exhausted therefrom at the proper times in the reciprocation of the 'en ine piston.

he invention has for a, further object to provide improved means for operating a plurality of rotary valves in a multiple c 'linder engine directly from the crank aft thereof.

Alloil ltl and more specific object of the invention resides in the provision of a rotaryvalve plate or disk of substantially conical form adapted for engagement with a seating surface formed upon the head of the en nne cylinder, and means for automatically supplying a lubricant to the surface of the valve plate between the same and its seat.

The invention has for still another object to'generally' rove and simplify the constrnct on of ya ves for internal combustion engines to increase their reliability and efiiciency in operation without adding materially to the cost of manufacture li 'wf.

i ith he above andother objects in view as will I ecome apparent as the description proceeds, the invention consists in certain constructions, combinations and arrangean describe and claim.

' fnents of the parts that I shall hereinafter reference is to be had to the following descri tipn' and accompanying drawing, in wine g F i fure 1 is a side elevation of a multiple ryl n er internal combustion englne showin the operating means for the rotary v'ai ves. lllg. 3 is a vertical section throng Specification of Letters Patent.

Application filed February 7, 191s.

Patented i, 1314 Serial No. aims-0i 2 is a horizontal section showing. the ar-' rangenient of the valves in an engine with die cylinder east in pairs. Fig. 42 is a side elevation partly in section of one of the valves removed from the engine cylinder. Fig. 5 is a diagrammatic View illustrating the "l cration ol the valve.

Referring in detail to the drawings, 5 designates the cylinders of an engine which may be of any ordinary or approved construction, and 6 designatest-he crank shaft thereof. The head of each engine cylinder is intm'nally provided with a valve seat 7.

8 designates my improved valve plate or disk which is of shallow conical fdrm and. is provided with an opening or port The. valve rod or stem 10 extends centrally through an opening 11 in the cylinder been and upon the same a worm gear 12 is cured. is provided with a series of worms 1%, the spiral teeth of alternate worms extending around the shaft in a reverse direction with respect to the remaining worms, The worms 1% are adapted "for meshing engage inept with the respective worm gears 15% whereby the valveplates or dislrs are rotated.

As shown in Fig. 2 of the drawings, each pair of engine cylinders is provided with a common intake port 15. to which the intake manifold is connected. and also a coremon exhaust port 16. The branches 15' and 16 of the intake and exhaustports re spectively, open into the adjacent engine cylinders. The intalie ports or openings 15' in the cylinder walls are substantially the same shape and dimensions as the port or opening 9 in the valve disk. This port it will be noted. tapers or is gradually reduced in width from its outer to its inner end, the width thereof being forty-ive do arees. through the. cylinder walls are however, of slightly greater width than the maximum width of the port in the valve plate, said exhaust ports extending through substarr tially fifty-four degrees of the circumferem tial extent of the valve seat.

The several strokes of the-engine piston are diagrammatically illustrated in Fig. 5,

and the valve disk is :llOWH with its port in reg stration ivlth the intake port of the cylnder, so that the genie being admitted to The exhaust ports, 16 which open A longitudinally disposed shaft- 13' intake port starts the understood that the oil or other lubricant This admis. Wu of the. gas commences as soon as the port 9 laps over the edge of the and continues through ninety degrees of the rotary mo vcment 01' the valve.

When the stroke of the piston is reversed to compress the gases the port of the valve is out of registrationwith the intake port, and said valve during, the compression stroke completes another ninety degrees of its rotary movement. in the explosion or power stroke of the piston, the third quarter or ninety degrees of the rotation of the valve is completed and. when the piston its upward movement on the evhaust strclre the port Qof valve starts its movement across the eiil'iaust port 16 of the engine cylinder, and owi'g' to the additional width cthis port the exhaust will 3 open for a eater portion of the wary movement oi -he valve than that during which the intake portis open. In ther words, the port 9 of the valve plate will over the edge of the exhaust port 1 3 shortly before the piston completes its power stroke or third quarter of 90 degrees and will be in partial or full registration with the exhaust port during the following ninety-nine degrees which completes a single rotation of the valve disl: or plate. It is thus apparent that in. each two revolutions of the engine crank shaft which is equivalent to the intake, compression, power and exhaust strokes of the engine piston, the valve disk is given. a single rotation. T e space between the intake and exhaust ports in the head the engine cylinder is equivalent the dimensions of the port 9 of the valve 1 that the exhaust 16 will be completely closed before the intake port is opened to admit the gases to the engine cylinder.

The several rotary valve disks are operated through the medium of the "power transmission shaft 1? which is provided with a beveled gear 18 on. its lower end to mesh with a similar 19 on the engine shaft. The upper end of this shaft 1'? is also provided with a beveled. gear 20 for en gagefnent with the gear 21 on the end oi the shaft- 1 in order to reduc "friction to a minimum and eliminate as far as possible wear upon th several valve disks, 1 provide an imi 'oved lubricating means for each of said valves. To this end, the upper surface of '11 1e valve disl is provided with a groove 22 1 s'With a central longitudinal valve rod or stem 10. The is bore communicates with :rior an oil cup at which is suitmcunted upon the upper end of the valve stem. in the groove 22 on-the surci'? the valve dish, a strip of absorbent mate 1 hi: is arranged. It will be readily upper ends of the cylinders by means of the screws-or bolts shown at .26. By simply removing these screws. the cylinder heads may be detached so that access may be had to the valves. Owing to the conical form of the valves, the same may be readily ground so that they will properly seat against the cylinder heads and leakage of the compression prevented. My improved lubricating means above referred to maintains a film of oil between the valve and its seat and eliminates waste of the oil.

From the foregoing description taken in connection with the accompanying drawings, it is thought that the construction and manner of operation of the invention Will be clearly and fully understood.

My improved rotary valve is extremely simple in its construction and highly efiicient and reliable in operation. It will of course be obvious that various other mechanisms foroperating the valves may be utilized in putting the invention into practical use, and while the cylinder heads are preferably formed with semicircular combustion chambers, it is obvious that the invention is not limited to this particular construction of the cylinder heads but may be readily applied to the several types of internal combustion-engines now in common use. The invention is also susceptible of many other minor modifications in the form, proportion and arrangement of the several parts and I therefore reserve the privilege of resorting to all such legitimate changes as may be fairly embodied within the spirit and scope of the appended claims.

Having thus described the invention, Whatis claimed is:

1. The combination with an engine having a combustion chamber provided with in take and exhaust ports, and a conical valve seat formed on the wall of said chamber, of a rotary valve mounted in the cylinder head and engaged upon said seat, said valve being provided with an opening to register with the intake and exhaust ports in the rotation of the valve, the surt'ace ot the valve which is opposed. to said seat being provided with a groove. an absorbent mater-ial arranged in said groove, an oil cup carried by the valve to supply a lubricating oil to the absorbent material whereby a film of oil is supplied to the seating face of the cylinder head, and means for rotating the valve.

2. The combination with an engine cylinder provided with a combustion chamber having intake and exhaust porte and a valve s ut formed upon the cylinder head, of a rotary valve disk provided with 21 stein ventrull lnnunted in the cylinder head, said valve disk having an opening adapted to register with the intake and exhaust ports in each rotation of the valve, the surface of the valve disk which is opposed to the valve seat haying a groove formed therein,

the valve stem being provided with a central here vominunimting with said gr00ve, a 15 1 trip of absorbent material arranged in said gimme. an ml cup mounted upon the valve vfem to supply oil to the bore thereof, and nit-unis iul' rotating said valve.

in testimony whereof I hereunto afiix 2 my signature in the presence of two Wituur'scs.

FR I61) ADRIAN TRUESDELL. \Vitnesses:

bk. 1.. Hormmsren, SIGIRD F. KEEFER. 

